wireless sensing & equipment monitoring - phoenix sentry

Wireless Sensing & Equipment Monitoring

An introduction to the benefits of equipping your assets with wireless sensors and remote monitoring equipment

10-04-2007 The 38th Annual Simcona Electronics Show

Agenda

• What is a wireless sensor network (WSN)?• Applications for a WSN• Configuring a WSN• The topologies of a WSN• What is Remote Monitoring?• Phoenix Sentry Remote Monitoring Solution


What is a wireless sensor network?

• A wireless sensor network is a group of distributed devices using sensors to cooperatively monitor physical or environmental conditions.

• Each node is typically equipped with a sensor, radio transceiver, a micro controller, and a power source.

• Size and cost can vary greatly based on system requirements.


Where did they come from?

• The development of wireless sensor networks was originally targeted towards military applications such as battlefield surveillance and landmine detection

• Wireless sensor networks are now used in many civilian applications for monitoring and automation


Applications for a WSN

• Environmental Monitoring

• Surveillance• Inventory Tracking• Medical/Health

Monitoring

• Fire Detection• Traffic Monitoring• Seismic Detection• Manufacturing

Process Control


Key Requirements

All wireless sensor networks share a set of basic requirements

• Small Form Factor• Low Power Consumption• Range• Minimal Human Intervention• Bi-directional Communication• Reliability• Responsiveness• Scalability


Configuring a WSN

• The first step in determining the configuration of a wireless sensor network is to evaluate and prioritize the key requirements

• Based on this priority the correct topology and network protocols can be selected


Types of wireless network nodes

• Endpoints – these are the actual sensors and their integrated electronics

• Routers – Used to extend range, avoid obstacles, and provide redundancy. Routers can also be endpoints if they have integrated sensors

• Gateways – Data aggregators that provide an interface to send data to the host system such as a LAN or satellite link


Star Topology

• The star topology is a system where all wireless nodes are in direct communication to the gateway with a typical range of 30 to 100 meters

• The star topology has the lowest overall power consumption, but it limited by a short range and provides no link redundancy


Mesh Topology

• The mesh topology is a system where every node is a router and is in contact with all of the surrounding nodes.

• The mesh topology allows for a theoretically unlimited range and is very fault tolerant, but this comes at the cost of increased latency due to the possibility of multiple node hops.


Star-Mesh Hybrid

• The star-mesh hybrid consists of router nodes configured in a mesh network. Each router is then the center of a star network for the sensor nodes that are in range

• This topology provides extended range due to the mesh network created by the router nodes, but it also provides better overall power consumption than a standard mesh network


Wireless Standards

The most common standards used in wireless sensing networks currently:

• WirelessHART(Only official standard for WSN)• ZigBee• Bluetooth• Wibree• Certified Wireless USB• 6LoWPAN


Wireless Standards Comparison

SSFH10 m1 Mbit/s2.4 GHzWibree

BandwidthChannelsRangeData RateFrequencyStandard5 MHz1610-75 m40 kbit/s915 MHzZigBee

5 MHz1610-75 m250 kbit/s2.4 GHzZigBee

UWB3-10 m110-480 Mbit/s3.1-10.6 GHzWireless USB

SSFH10 m3 Mbit/s2.4 GHzBluetooth(2.0)


What is remote monitoring?

• While wireless sensor networks allow for the collection of data from many locations, remote monitoring is the process of collecting, storing, analyzing, and displaying that data remotely.

• Ideally, your remote monitoring system will allow you to have all the same functionality you would have if you were on location with your equipment.


Benefits of remote monitoring

• 24/7 access to equipment status information and archived data

• Reduction in labor costs due to fewer on-location visits by personnel

• Ability to identify and fix failing equipment before total failure occurs

• Instant notification when failures or alarms do occur


Remote Monitoring Applications

• Water Treatment Facilities• Environmental Monitoring• Commercial Equipment Monitoring• Utility Substations• Long Distance Research &

Development• Homeland Security Requirements


Phoenix Sentry System

• Linux based device• Gateway communicates with host via the

Internet• Each Phoenix Sentry monitor has multiple I/O• I/O can be increased by the use of expansion

modules• All signals can trigger custom alarms both

locally and remotely via email or SMS text messaging.


Phoenix Sentry Specifications

• Ethernet, Cellular Modem, 56K Dial-up modem, or Wi-Fi options for Internet connectivity

• Base system includes:– (4) Dry Contacts Inputs– (1) 0-10VDC Input– (1) 4-20mA Input– (1) Tamper Detection Input– (2) Remotely controlled relays drivers (relays are optional)

• Spring loaded terminal blocks for easy field installation

• Remote Software Updates• FCC/UL/CSA approvals


Phoenix Sentry Screenshot


Case Study

• Municipality was not aware of abnormal behavior at wastewater pumping station

• Installed remote monitoring system at pumping station and immediately noticed problem

• Maintenance was performed and equipment failure was avoided.

• Added benefit of almost 50% energy savings due to changes made at pumping station


Case Study – Graphs

Before

After


Thank You!

Any Questions?

Presentation available for download atwww.PhoenixSentry.com

wireless sensing & equipment monitoring - phoenix sentry

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